Jose Altuve leaps high for a throw from catcher Jason Castro as the Texas Rangers' Elvis Andrus steals second base in the first inning.

Jose Altuve leaps high for a throw from catcher Jason Castro as the Texas Rangers' Elvis Andrus steals second base in the first inning.

Photo: Paul Moseley / McClatchy-Tribune News Service

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Ian Kinsler dives for a hard hit by Brian Bogusevic in the second inning at the Rangers Ballpark in Arlington.

Ian Kinsler dives for a hard hit by Brian Bogusevic in the second inning at the Rangers Ballpark in Arlington.

Photo: Paul Moseley / McClatchy-Tribune News Service

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Jose Altuve, bottom right, steals second base as Ian Kinsler, top, leaps and umpire Dale Scott looks on during the third inning.

Jose Altuve, bottom right, steals second base as Ian Kinsler, top, leaps and umpire Dale Scott looks on during the third inning.

Photo: LM Otero / Associated Press

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Jordan Schafer dives back to first base to beat a pickoff from Yu Darvish during the fifth inning.

Jordan Schafer dives back to first base to beat a pickoff from Yu Darvish during the fifth inning.

Photo: LM Otero / Associated Press

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Elvis Andrus beats the throw to Brett Wallace at Rangers Ballpark in Arlington.

Elvis Andrus beats the throw to Brett Wallace at Rangers Ballpark in Arlington.

Photo: Rick Yeatts / Getty Images

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Rangers starting pitcher Yu Darvish throws during the first inning against the Astros.

Rangers starting pitcher Yu Darvish throws during the first inning against the Astros.

Photo: LM Otero / Associated Press

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Adrian Beltre, left, arrives at the dugout, greeted by manager Ron Washington, after scoring on a two-run single by David Murphy in the fifth inning.

Adrian Beltre, left, arrives at the dugout, greeted by manager Ron Washington, after scoring on a two-run single by David Murphy in the fifth inning.

Photo: Paul Moseley / McClatchy-Tribune News Service

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Astros place Bud Norris on DL with sprained knee

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ARLINGTON — The Astros placed Bud Norris on the 15-day disabled list with a sprained knee to open the roster spot for lefty Dallas Keuchel, who is starting Sunday in Norris’ place.

Norris had already been ruled out for this start, but with some of his struggles in a bullpen session, they will shut him down retroactive to his last start.

“We want to make sure that he’s 100 percent when he comes back, that he’s not tentative putting weight on it to throw the thing,” manager Brad Mills said.

The rotation is still to be determined until Norris can return; an off-day Thursday gives more flexibility. In the meantime, Norris will be doing some exercise and will possibly have a rehab assignment.

“I’m hoping one 15-day DL with retro is only two (starts), that it’s going to be OK and I can get out there and really help this team have a better second half,” Norris said.

The knee problems have been related to a struggle with a hip flexor injury that began on the Astros’ late-May road trip to Colorado.

“I’ve been trying to go out there and pitch at 80 percent and unfortunately I haven’t been helping the team much,” Norris said. “It’s frustrating in that regard. I want to be out there every fifth day.”

In order to make room on the 40-man roster for Keuchel, lefty Sergio Escalona, who is out for the season after Tommy John surgery, was transfered to the 60-day DL.